Means for catching a broken yarn and piecing it to the sliver,particularly for use with spinning frames and spinning and twisting frames



Se t. 16, 1969 N. l. ARTAMONOVA ET 3,466,852

MEANS FOR CATCHING A BROKEN YARN AND PIECING IT TO THE SLIVER, PARTICULARLY FOR USE WITH SPINNING FRAMES AND SPINNING AND TWISTING FRAMES Filed July 20, 1967 2 Sheets-Sheet 1 FIG? Sept. 16, 1969 N. I. ARTAMONOVA EI'AL 3,466,862

MEANS FOR ING A BROKEN YARN AND PIECING IT THE SLIVER, ICULARLY FOR USE WITH SPINNIN SPINNING AND TWISTING FRAMES Filed July 20, 1967 2 Sheets-Sheet 2 GFR S United States Patent MEANS FOR CATCHING A BROKEN YARN AND PIECING IT TO THE SLIVER, PARTICULARLY FOR USE WITH SPINNING FRAMES AND SPIN- NIYG AND TWISTING FRAMES Nadezhda Ivanovna Artamonova, Sovetskaya ulitsa 9, kv. 14, Barnaul, U.S.S.R.; Leonid Mikhailovich Bushin, Ulitsa Gagarina 2, kv. 9, Novoaltaisk, U.S.S.R.; Alexandr Evseevich Bykov, Ulitsa Dmitrova 81, kv. 4; Nikolai Demyanovich Gritsenko, Ulitsa Leuina 63-a, kv. 20; Anna Timofeevna Zhurenko, Burlinsky proezd 6; Nikolai Mikhailovich Kuchin, Nikitinskaya ulitsa 83, kv. 12; Sergei Dmitrievich Kirkinsky, Komsomolsky prospekt 50, kv. 1; Svetlana Georgievna Sitnikova, Pushkinskaya ulitsa 54, kv. 27; Vitaly Filippovich Solyanik, Ulitsa Lenina 65, kv. 21, and Leonid Mikhailovich Urvantsev, Kornsomilsky prospekt 50, kv. 3, all of Barnaul, U.S.S.R.; Alexandr Vasilievich Tikhomirov, 3 Bereznikovskaya ulitsa 10, Ivanovo, U.S.S.R.; Vyacheslav Savich Yarovoi, Pribytkovskaya ulitsa 18, korpus 8, kv. 169, Leningrad, U.S.S.R., and Boris Ivanovich Yasjukevich, Ulitsa Lenina 85, kv. 37, Barnaul, U.S.S.R.

Filed July 20, 1967, Ser. No. 654,894 Int. Cl. D01h 13/26 US. Cl. 57-34 2 Claims ABSTRACT OF THE DISCLOSURE A device for use in spinning and twisting machines for catching a broken yarn end and piecing it to the sliver in which the catcher includes two interconnected plates defining a wedge-shaped slot and the piecing unit includes a rubber covered roller.

The present invention relates to spinning frames and to spinning and twisting frames, and more particularly to means for catching a broken yarn end and piercing it to the sliver.

Known at present are thread piercing devices comprising: a sensor for checking the absence of breakages in the section between the drafting means and the thread guide; a broken end catcher defined by a solenoid provided with a movable core which is activated when a signal is sent by the sensor; a yarn piecing device and an operating mechanism actuated by the sensor and activating the yarn piecing device (see US. Patent No. 3,149,- 451, class 57-22, 1964). Since in the above mentioned devices the broken yarn end is not brought in the middle of the sliver, it may be that the yarn will not be pieced to the sliver. This is the main drawback presented by devices of this character. Moreover, such in devices the yarn remains constantly under the action of the sensor and, as a result, the spinning process is impaired.

In these devices, the broken end is not straightened, and due to the inertness of the sensor-solenoid system, the latter is late in catching the broken end, as the time required for the yarn to pass the distance between the sensor and the solenoid is less than the duration of the action of the sensor-solenoid system.

An object of the present invention is to provide a device for the elimination of the above drawbacks thereby ensuring a better piecing of the yarn with the sliver.

Another important object of this invention is to provide a device of the character described which is capable of ensuring a greater reliability in operation.

Still another object of the invention is to provide a device of this type which is of simple design and convenient in operation.

These and other objects of the invention have been achieved by means of a device for use on spinning frames "ice and on spinning and twisting frames, in which a broken end catcher and a yarn piecing mechanism are provided in the space between the drafting system and the thread guide. The broken end catcher and the yarn piecing mechanism follow the sliver and bring the broken end to the middle of the sliver. The broken end catcher is defined by several interconnected elements, with two of such elements being disposed relative to each other so as to provide a Wedge-shaped slot therebetween thereby ensuring the free passage of the yarn in the widest portion during normal spinning and jamming of the yarn in the narrow portion in the case of its breakage.

Movement is imparted to the broken end catcher and to the yarn piecing mechanism by means of a flexible draw bar operably connected with the machine ring and by a carrier to which the flexible draw bar is attached and which is geared with the broken end catcher and the yarn piecing mechanism. For a better understanding of the invention there is set forth below a description of one of the possible embodiments thereof with reference to the accompanying drawings, wherein:

FIG. 1 is a view partly in elevation and partly in cross section of the device according to the invention;

FIG. 2 is a top view of the device illustrated in FIG. 1;

FIG. 3a and 3b are fragmentary views in perspective of the broken end catcher at normal spinning and at the moment of yarn breakage; and

FIGS. 4a and 4b are diagrammatic views showing the broken end catcher in different positions.

The present device for use on spinning frames is constituted by a broken end catcher 1 (FIG. 1) and a yarn piecing mechanism 2 following the web emerging from a drafting means 3 and the take-up spindle of the spinning frame. There is one device for each spindle location.

The broken end catcher 1 comprises two interconnected plates 4 and 5 so disposed relative to each other that a wedge-shaped slot is provided therebetween. The slot allows the free passage of yarn 6 from the feed package to the take-up spindle in its wide portion during normal spinning and ensures the jamming of the yarn in its narrow portion in the case of breakage as illustrated in FIGS. 3a and 3b respectively.

The interconnected plates 4 and 5 (FIG. 1) are mounted on a shaft 7 attached to a bar 8. More particularly, the plate 5 is bent to provide a sleeve 5a which embraces the shaft 7 and a shank 9 is fixed to the sleeve for coaction with a contact 10 of a pneumatic sensor 11, with the sensor being fixed on the bar 8. The broken end catcher is arranged laterally of the bar 8.

The yarn piecing mechanism 2 comprises a rubber coated roller 12 and two lever arms 13 and 14 connected together by a spring 15. The roller 12 is rotatable about a shaft 16 fixed to the lever arm 13 and a plate 17 is rigidly attached to the lever arm 14 together with the bar 8 and the arms 13 and 14 are mounted on a bushing 18.

The lever arms are mounted on the bushing 18 so as to be capable of turning relative thereto, both simultaneously and alternately. It will be noted that the roller 12 and the shaft 16 project laterally from the arm 13 in spaced relationship to the end catcher 7 (FIG. 2).

The lever arms 13 and 14 together with the roller 12 and plates 4 and 5 are moved following the sliver by a flexible draw bar 19 (FIG. 2) connected with the machine carn'er (not shown in the drawing) and a ring 20 carrying the draw bar 19. The ring is connected by a washer 21 with the bushing 18 of the lever arms 13 and 14.

The bushing 18 can turn about a shaft 22 stationarily secured on a bracket 24 which in turn is stationarily attached on a plate 23 serving as a base for the device and fixed to the roll beam of the spinning machine. As a result of the movement of the roller 12 and plates 4 andS following the sliver, the broken end is positioned precisely in the middle of the sliver, due to which action a better and more reliable piecing of the yarn is achieved.

The bar 8 is constantly pressed against the roller 12 by a spring 25 (FIG. 2).

Roller 12 not only follows the sliver in its movement, but is also turned around the shaft 22 by a rod 25 of a pneumatic cylinder 26 one end of the rod 25 is attached to the lever arm 13 as at 25a (FIG. 1). The rod 25 is connected at its other end to a piston 27, and a spring 28 is located between the piston and end of the cylinder for urging the piston towards the opposite end of the cylinder.

A space b of the pneumatic cylinder 26 is connected by a flexible hose 29 with the sensor 11 which is constant ly supplied with compressed air from the air main of the spinning frame.

The entire actuating mechanism can rotate together with the rod 25 and the cylinder 26 in a horizontal plane relative to the plate 23 about a vertical axis fixedly secured in the plate 23 (not shown) disposed under a clamp C by which the cylinder is attached to the plate. Consequently, the cylinder 26 can turn in both the horizontal and vertical planes.

In the course of operation, the bushing 18 together with the lever arms 13 and 14 mounted thereon reciprocates in the horizontal plane along the shaft 22 so that the cylinder 26 executes an oscillating movement about the vertical axis on which it is secured in the plate 23 serving as a base.

The reciprocation is imparted to the bushing 18 via the drawbar 19 connected at one end with the machine carrier (not illustrated) and at the other end movably with the ring 20 capable of rotation and secured by the washer 21 on the bushing.

The continuous oscillating movement of the yarn piecing means about the vertical axis provides for the reciprocating movement of the broken end catcher and the yarn piecing roller synchronously with the sliver reciprocation along the drawing mechanism of the machine.

The device operates in the following manner:

At normal spinning the yarn 6 passes through the wide portion of the slot a as shown in FIG. 3a and at this moment the shank 9 of the plate does not coact the contact of the pneumatic sensor 11. As a result, no air will be admitted into the space b of the pneumatic cylinder 26, and the rod 25 will occupy its foremost front position due to the action of the spring 28. When the rod 25 is in this particular position, the lever arms 13 and 14 are pressed together by the spring 15, and the roller 12 is beneath the broken end catcher 1 as illustrated in FIG. 4a.

During normal spinning and at the moment of yarn breakage the drawbar 19 connected with the machine carrier displaces the bushing 18 along the shaft 22 by means of the ring and washer 21. Due to this, the roller 12 and plates 4 and 5 reciprocate and follow the sliver emerging from the spinning frame drafting means 3.

At breakage, the yarn 6 passes through the narrow portion of the slot a as shown in FIG. 3b and is jammed therein. The yarn caught in the slot tends to turn the plates 4 and 5 around the shaft 7. As a result, the shank 9 engages the contact 10 of the pneumatic sensor 11. The sensor is activated and compressed air flows through the hose 29 into the space b of the pneumatic cylinder 26 thereby displacing the piston 27 to the right (FIG. 1) and compressing the spring 28 so that the rod is retracted into the pneumatic cylinder 26. The rod 25 rotates lever arms 13 and 14 pressed thereto by the spring 15 in the direction of arrow A. The plates 4 and 5 between which the yarn is clamped rotate and raise together with the lever arms. At this moment, the yarn is unwound from the package and as soon as the plate 17 engages the fluted roller of the drafting means 3, the lever arm 14 stops and only the lever arm 13 continues its rotatable movement. This rotatable movement will cause the roller 12 to move from beneath the broken end catcher 1 and press against the fluted roller of the drafting means 3, as shown in FIG. 4b. Thereupon, the roller 12 starts to rotate and pulls the yarn 6 from the slot a thus straightening the broken end and bringing such end over the sliver.

After the yarn end has been drawn out of the narrow portion of the slot a, the plates 4 and 5 return into their initial position, the sensor is deactivated and the air supply to the space b in the pneumatic cylinder 26 is arrested.

The spring is released and the rod 25 assumes its initial position. The lever arms 14 and 13 are brought together by the spring 15, and the roller 12 returns to the position shown in FIG. 4a. After this, the above cycle is repeated.

Thus, the device described hereinabove ensures the positioning of the broken end of the yarn in the middle of the sliver, as well as straightening of the broken end, and makes the attendance more convenient.

We claim:

1. In spinning and spinning and twisting frames of the type having drafting means, a take-up spindle and means for catching a broken yarn and piecing the same to a sliver arranged between the drafting means and takeup spindle, said catching and piecing means including a base, a pair of lever arms, spring means interconnecting said lever arms, means mounting one end of said lever arms to said base whereby said lever arms are capable of relative rotation, a roller mounted for rotation adjacent the opposite end of one of said lever arms, said lever arms and roller constituting a yarn piecing mechanism, a bar mounted on the other of said lever arms and having a free end engaging the periphery of said roller, a pair of interconnected plates so arranged as to provide therebetween a wedge-shaped slot, said slot allowing the free passage of the yarn in its wide portion at normal spinning and the yarn jamming in the narrow portion after yarn breakage, means mounting said plates on said bar for movement toward and away from the roller, said interconnected plates defining a broken yarn end catching mechanism, means operably connected to said lever arms mounting means for moving said mounting means and arms transversely to follow the sliver whereby the broken end is positioned precisely in the middle of the sliver, movement imparting means operably coupled to one of said lever arms to rotate said lever arms upon activation thereof, sensor means on said bar operably connected to said movement imparting means to activate said movement imparting means, and actuating means on said mounting means for said plates to activate said sensor means, the arrangement being such that during normal spinning, the yarn passes through the wide portion of the wedge-shaped slot and said lever arms mounting means reciprocate tarnsversely so that the roller and interconnected plates follow the sliver emerging from the drafting means but upon yarn breakage, the yarn passes through the narrow portion of the wedge-shaped slot and is jammed therein thus turning the interconnected plates so that the actuating means actuates the sensor means to activate the movement imparting means thereby turning said lever arms in the direction of the drafting means until said other lever arm engages the drafting means whereby its movement is stopped while said one lever arm continues its rotation causing the roller to move from beneath the end catching mechanism and press against the drafting means thereby rotating the roller which pulls the yarn from the wedge-shaped slot thereby straightening the broken end and positioning such end over the sliver.

2. The apparatus as claimed in claim 1, in which said movement imparting means includes a cylinder, a piston slidahle therein, a piston rod operably connected to said one lever arm, a spring within said cylinder normally biasing said piston rod outwardly of the cylinder, means for supplying compressed air to said sensor means, and a flexible hose between said sensor means and said cylinder for supplying air to said cylinder to retract the piston rod against the action of the spring means.

References Cited UNITED STATES PATENTS 729,901 6/1903 Schmidt 57107 XR 2,706,883 4/1955 Keen 57-107 XR 2,886,941 5/1959 Bahnson 57107 XR 6 9/1964 Benson et a1 5722 8/1967 Morin et a1 5745 XR FOREIGN PATENTS 11/ 1940 Great Britain.

JORDAN FRANKLIN, Primary Examiner W. H. SCHROEDER, Assistant Examiner US. Cl. X.R. 

